Switch to Rust 1.64 (#816)

Author: zjb0807

.github/workflows/coverage.yml

@@ -39,7 +39,7 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly-2022-05-15
+          toolchain: nightly-2022-08-05
           components: rustfmt
           target: wasm32-unknown-unknown
           default: true

.github/workflows/master.yml.disabled

@@ -16,7 +16,7 @@ jobs:
       uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: nightly-2022-05-15
+        toolchain: nightly-2022-08-05
         override: true
         default: true
     - name: Install cargo-unleash

.github/workflows/test.yml

@@ -33,7 +33,7 @@ jobs:
       uses: actions-rs/toolchain@v1
       with:
         profile: minimal
-        toolchain: nightly-2022-05-15
+        toolchain: nightly-2022-08-05
         components: rustfmt
         target: wasm32-unknown-unknown
         override: true